Meaning of POLYGON in English
also frequency polygon ; a graph fromed by joining the midpoints of the tops of successive bars in a histogram with straight lines
Note: as the number of classes is increased and simultaneously the width of classes is decreased, the polygon becomes a smooth curve , or frequency curve .
Sean Woo's Finance, GIS and real estate English glossary. Английский глоссарий по ГИС(Географическая информационная система) и недвижимости Sean Woo's Finance. 2012